Table $1$: Layers of the Internet Protocol Stack

$($i$)$ Identify the layer that delivers the functions listed in the LHS column of Table $1$

and assign the layer name to the RHS column. Remember to give your answer in

your answer book.

$($ii$)$ Name the Protocol Data Units used in layers $1,2,3$ and $4$ of the OSI model.

$($iii$)$ Describe the mapping between the layers of the OSI model and the TCP$/$IP model.